Furnace.



PATENTED JUNE 13, 1905.

No. ?92,04&

G. S. KBNT.

FURNACB.

APPLIOATION I'ILED SEPT. 21, 1904.

2 SHEETS-SHEET 1.

W TV E 885 8:

AT'ORNEYS PATENTED JUNE 13, 1905.

G. S. KENT.

FURNAGE.

APPLIOATION I'ILED SBPT.21.1904.

2 SHEETB-SHEET 2.

WIN/58858:

ATTDRNHS No. 792,o48.

Patented June 13, 1905.

PATENT OFFICE,

GEORGE SAMUEL KENT, OF BUFFALO, NEW YORK.

FURNACE.

SPECIFICATION formng part of Letters Patent No. ?92,048, dated June 13,1905. Application filed September 21, 1904:. Serial No. 225,297.

To (all whom, it hum conccrn:

Be it known that I, GEORGE SAMUEL KENT, a citizen of the United States,and a resident of Buffalo, in the county of Eric and State of New York,have invented a new and Improved Furnace, of which the following is afull, clear, and exact description.

The purpose of the invention is to provide an improvement upon a furnacefor which a patent was granted to me September 27, 1904, No. '771,159,the main purpose of the invention being to so construct a furnace thatit will be an overdraft-furnace and will have a vast Capacity forproducing heat and which will thoroughly burn fine coal before said coalcan escape to the ash-pits.

A further purpose of the invention is to provide a centralcombustion-chamber the side walls of which have lower spaced teeth andan u pper dead-plate, which side walls of the combustion chamberconstitute the inner walls of fuel-chambers, the outer walls of saidfuel-chambers being in the form of hinged plates having upperdead-sections and lower spaced toothed sections, the latter sectionsbeing normally held in engagement with the base-section of thecombustion-chamber.

Another purpose of the invention is to provide three ash-pits, onebeneath the combustion-chamber and one beneath each fuel-chamber, thusproviding for a free discharge of the cinders.

Another purpose of the invention is to provide agitators or breakersadapted to turn in spaces in the base portion of the combustionchamberand operate in the bottom of the fuelchambers, the said agitators orbreakers being operated from the exterior of the furnace, so that thebed of cinders which usually accumulates at' the bottom of afuel-chamber may be so effectually reduced that said cinders willquickly drop into the ash-pits.

The invention consists in the novel Construction and combination of theseveral parts, as will be hereinafterfullyset forth, and pointed out inthe claims.

Reference is to be had to the acc'ompanying drawings, forminga part ofthis specification, in which similar characters of reference indi- Catecorresponding parts in all the figures.

Figure 1 is a front elevation of the improved furnace. Fig. 2 is atransverse section taken vertically on the line 2 2 of Fig. 3. Fg. 3 isa longitudinal section likewise taken vertically on the line 3 3 of Fig.2; and Fig. %i is a perspective View of a portion of thecombustion-chamber, portions of the fuelchamber and the base on whichthe combustion-chamber is supported, and the central ash-pit.

The front Wall 10, the back Wall 11, and the side walls 13 of thefurnace are preferably made of brick, although any other suitablematerial may be employed, and these walls are provided, preferably, withan outerjacket 14, of metal.

At the central portion of the furnace,or practicallyso, a partition B isformed, adapted as a portion of the base of a combustionchamber BQ to behereinafter described. This partition B consists of suitably-spacedparallel walls 15 and 16, extending from the front to the rear of thefurnace, providing What I term a central ash-pit 17, closed at the rearby the rear wall of the furnace and having an opening in the front ofthe furnace normallycloscdbyasuitabledoor173 (shown in Fig. 1.)

In the upper portion of the inner faces of the walls 15 and 16 upwardlyand outwardly inclined recesses 16* are produced, alternated byupwardly-extending tongues 16, which are of a depth equal to thethickness of the said walls, as is shown in Figs. 2 and 4, and the upperfaces of the tongues 16 are fiush With the upper faces proper of thesaid walls 15 and 16. The walls 15 and 16 may be of any suitablematerial; but fire-brick is preferably employed for the purpose.

Bridge-bars 18, preferably made of metal, extend across the upperportion of the ashpit, resting upon the upper edges of the walls 15 and16, where the tongues 16 are located, and these bridge-bars 18 areseparated by suitable battens 19, transversely and centrally produced ontheir side faces, and the ends of the bridge-bars 18 are upwardly andinwardly inclined or are inclined in direction of each other, as isshown in Figs. 2 and 4. Tongues 20 are longitudinally formed at theupper faces ot' the said bridge-bars 18, while in the side edges of thebridge-bars concave transverse reccsses 21. are produced, the reccssesbeing preferably two in number, and the reccsses 21 of all of thebridge-bars are in longitudinal alinement.

Gap-bars 22, made ot' lire-brick and having a corresponding shape to thebridge-bars, are located on the upper faces ot' the bridge-bars, beingheld in place by producing grooves in the bottom portions of thecap-bars; which grooves receive the tongues at the upper portions of thebridge-bars, as is illustrated in Fig. 4.

The top port-ion of the 'urnace may be constructed in difi'erent ways,but is provided under all conditions with metal side sections 23, havingmarginal tlanges 24 extending down over the upper portions of the outerjacket 14, and in these upper side sections 23 openings 25 are produced,normally closed by covers 26, as is illustrated in Figs. 1 and 2, andfuel for the fuel-chambers, to be hereinafter described, is passed intothe said chambers through said openings 25. i

It may be here remarked that upwardly-extending flanges 14 are producednear the inner edges ot' the side sections 23, and between theseextensions 14 a segmental deme-section A is located, properly supportedby the said side sections 23, which deme-section A may be eitherpermanent or removable, as desired. The said donne-section and the upperplatesections 23 eonstitute the top of the turnace.

Bars 27, preferably made of lire-brick, extend 'from the cap-barsupwardly and outwardly to an engagemeut with the bottom edges of thedome A and to an engagement with the inner edges of the top plates 23,as is shown best in Fig. 2. These bars are therefore in opposing series,and the bars of the series are spaced one from the other a suitabledistance, thereby )1'oviding what T term a combustion-ehamber B', havingan outlet 29 at the rear ot' the turnace, adapted to be connectedwherever desired. Each bar 27 consists of a lower toothed section 27 andan upper dead-plate section 27' the toothed section 27 of the said barsbeing made by longitudinally recessing their side edges, and thereforewhen these bars 27 are placed in position so that the side edges of thedeadplate section 27 engage, as is shown in Fig. 4, a series of openings28 is produced, and these openings 28 communicate with the openingsbetween opposing bridge-bars and capbars, as is shown in Fig. 4, and thelatter openings communicate with the ash-pit 17 by reason of therecesses 16 in the inner faces ot' the walls of the ash-pit, thusenabling the ashes coming in contact with the ends of the bridge and capbars to be directed to the central ash-pit 17.

The grate-bars C are two in number, located one at each side ot' thecentral partition B, as

is shown in Fig. 2. Each grate-bar consists of an upper dead-wallsection 30 and a lower toothed section 31, the said grate-bars at theirupper edges near their ends being provided With lugs 32, which arepivoted, by means of pins 33,to suitable projections 34, from the underfaces of the top plates 23, and in the closed or normal position ot' thegrate-bars they are parallel with the bars 27, forming the sides of thecombustion-ehamber B and the ends ot the toothed sections 31 of the saidgrate-bars rest upon the partition B where the bridgebars engage withthe walls 15 and 16, as is shown in Fgs. 2 and 4.

Sectors 35 are shown in Figs. 2 and 3 as hinged to lugs 36, located onthe outer faces of the grate-bars C, ad jacent to the lower edge of thedead-plate sections 30 of said grate-bars. These sectors are preferablythree in number for each grate-bar, one sector being located aboutcentrally between the ends of the gratebar and the other two at or nearthe ends of the said bar. These sectors 35 are provided. with top andbottom teeth 37, adapted to engage with upper and lower pinions 38 and39, Secured upon upper and lower shat'ts 40 and 41, mounted to turn inthe side walls of the furnace, and where the sectors 35 are locatedsuitable openings 42 are produced in the side walls. Said openings arenormally closed by doors 43 of any approved construction, which doorsare opened when the grates are to be dumped to enable the sectors 35 topass outward at their outer ends beyond the outer faces of the sidewalls of the furnace. All of the shafts 40 and 41 extend out through thefront of the furnace, and the upper sha'fts 40 at their projectin'g endsare rendered polygonal to receive a suitable crank whereby to turn saidshafts 40.

A gear-wheel 44 is Secured to the outer end of each sha'ft 40, and apawl 45 is cmployed in connection with each of the gear-wheels 44 tohold the grate-bars C in their inner or outer positions after they havebeen adjusted to such positions by the action of the pinions 38 and 39on the toothed sectors 35, and in order that both shafts 40 and 41,employed in the adjustment ot' a grate-bar, shall move together a gear46 is secured to the outer end of each of the shafts 41, and these gears46 mesh with the gears 44, as is illustrated in Fig. 1.

More or less air may be admitted to the combustion-chamber B by openingdoors 47 at the front ot' the furnace, mounted to slide in suitableguides 48, and attention may be given to the lire' in the 'fuel-chambersD by the use of suitable stoking-tools. In the front of the furnacedoors 49 are located,whieh doors may be sliding or swing doors, andthese doors when opened permit access to be obtained to the'uel-chamber, uncoveriug openings leading thcreto. Access is gained tothe two side ash-pits 50 and 51 through the medium of doors IOO 52, alsolocated at the front of the furnace, as is illustrated in Fig. 1. Inorder to facilitate combustion, a steam-pipe 53 is made to pass throughan opening 5& in the front of the furnace; but the nozzle end of thesteam-pipe does not eXtend into the interior of the furnace, as is shownin Fig. 3, so that when the steam enters the combustion-chamber it willhave been thoroughly mixed with the admitted air. l

Shafts 55 and 55 are located at each side of the bridge-bars 18, beingmounted to turn in the recesses 21 in the said bridge-bars, and on eachshaft 55 and 55 asegmental agitating or crushing plate or member 56 ismounted, and these crushing plates or members 56 are adapted as theshaft is revolved to make a complete revolution, and when they are intheir normal position with their segmental faces downward, as is shownin Fig. 2, they form a grating at the bottom portion of thefuel-chambers D, and the said crushing or agitating plates on the uppershaft 55 have movement in said fnel-chambers adjacent to thecombustion-chamber, while the lower crushing or agitating plates 56 onthe lower shafts 55 have movement in the lower outer portions of thesaid fuel-chambers and in the spaces between the toothed sections 31 ofthe gratebars C, and all of the said crushing or agitating plates 56have movement in the spaces which occur between the bridge-bars 18.

Both shafts 55 and 55 eXtend out through the front of the furnace, andthe shafts 55 have their outer ends rendered polygonal to receive awrench or a key of any description, and, each upper shaft 55 at itsouter end is provided with an attached gear 56, and these gears 56 meshwith gears 57, secured on the corresponding end of each lower shaft 55",as is shown in Fig. 1.

The covers 26 are provided with suitable dampers which are operated tofurnish the fire with suitable draft, thus rendering the furnace anoverdraft furnace, which is of importance in the art.

Having thus described my invention, I claim as new and dcsire to secureby Letters Patent- 1. Inafurnace,acasing,acombustion-chamber locatedwithin the casing, said casing being provided with a dome-top and withside walls inclined toward each other at their lower ends, the said sidewalls comprising upper dead-plate sections and lower toothed sections, ahollow base constituting a central ash-pit, bridge-bars spanning thesaid ash-pit, which bridge-bars are spaced, the spaces between thebridge-bars corresponding to the openings between the toothed portionsof the sides of the combustion -chamber, the openings between thebridge-bars being likewise in communication with the central ash-pit,adjustable grate-bars spaced from the side walls of thecombustion-chamber, being movable to and from them, and side ash-pitsbeneath the grate-bars.

2. Inafurnace,acasing,acombustion-chamber located within the casing,said casing being provided with a dome-top and with side walls inclinedtoward each other at their lower ends, the side walls comprising upperdeadplate sections and lower toothed sections, a base comprising anash-pit, bridge-bars spanning the said ash-pit, which bridge-bars arespaced, the spaces between the bridge-bars corresponding to the openingsbetween the toothed portions of the sides of the combustion-chamber andthe openings between the bridge-bars being in communication with thesaid ash-pit, grate-bars spaced from the walls of the combustion-chamberand hinged at their upper ends to the casing, their lower ends beingtoothed and adapted to normally rest at the upper edges of the ash-pit,means for opening and closing the said grate-bars, shafts located at thesides of the bridge-bars, means for Operating the said shafts from theexterior of the furnace, and crushing or agitating plates Secured to thesaid shafts, Operating partially within the space between the gratebarsand the combustion-chamber and through the spaces between the teeth ofthe grate-bars and within the spaces between the bridgebars.

3. Inafurnace,acasing,acombustion-chamber formed in the said casing,having side walls which extend from the top of the casing downwardtoward each other within the casing, bridge-bars spaced from oneanother, forming supports for the side walls of the saidcombustion-chamber, the said side walls having series of openings in thelower portions thereof communicating with the spaces between thebridge-bars, the ash-pit beneath the said bridge-bars in communicationwith the spaces between them, adjustable grate-bars located at each sideof the combustion-chamber, and spaced therefrom forming fuel -chambers,means for adjusting the said grate-bars, which grate-bars are providedwith toothed lower portions and upper dead-plate sections, an ash-pitlocated beneath each grate-bar, said ash-pits being one at each side ofthe ash-pit heretofore mentioned, and means for su pplying fuel to thefuel-chamber.

4. In a furnace,a casing, a combustion-chamber within the casing, havingopenings at the lower portions of its sidesan ash-pit, a support for thelower portion of the combustionchamber carried by the ash-pit andprovided with a series of openings in communication with the openings inthe sides of the combustion-chamber, grate-bars hinged at their upperends within the said casing spaced from the walls of thecombustion-chamber and adapted to rest upon the upper portion of theash-pit, the lower portions of the said gratebars being toothed, andeXteriorly-opcrated IOO IIO

sha'fts journaled in the bridge-bars at their ends, and segmentnlagitatng-plates Secured to the said shafts, operatingwthin the openngsbetween the bridge-bars and within the spaces between theeonbuston-chamber and the grate-bars, and through the openings betweenthe teeth of the grate-bars.

In testimony whe'eo'f I have signed my name to this specfieation in thepresence of two subse'bng witnesses.

GEORGE SAMUEL KENT;

VVtnesses:

D. WILSON, JAMES STURDY.

